41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#ifndef BASE_TIME_CLOCK_H_
|
||
|
|
#define BASE_TIME_CLOCK_H_
|
||
|
|
|
||
|
|
#include "base/base_export.h"
|
||
|
|
#include "base/time/time.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
// A Clock is an interface for objects that vend Times. It is
|
||
|
|
// intended to be able to test the behavior of classes with respect to
|
||
|
|
// time.
|
||
|
|
//
|
||
|
|
// See DefaultClock (base/time/default_clock.h) for the default
|
||
|
|
// implementation that simply uses Time::Now().
|
||
|
|
//
|
||
|
|
// (An implementation that uses Time::SystemTime() should be added as
|
||
|
|
// needed.)
|
||
|
|
//
|
||
|
|
// See SimpleTestClock (base/test/simple_test_clock.h) for a simple
|
||
|
|
// test implementation.
|
||
|
|
//
|
||
|
|
// See TickClock (base/time/tick_clock.h) for the equivalent interface for
|
||
|
|
// TimeTicks.
|
||
|
|
class BASE_EXPORT Clock {
|
||
|
|
public:
|
||
|
|
virtual ~Clock();
|
||
|
|
|
||
|
|
// Now() must be safe to call from any thread. The caller cannot
|
||
|
|
// make any ordering assumptions about the returned Time. For
|
||
|
|
// example, the system clock may change to an earlier time.
|
||
|
|
virtual Time Now() const = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace base
|
||
|
|
|
||
|
|
#endif // BASE_TIME_CLOCK_H_
|